CN2421796Y - Electronic ballast for safety voltage power-supplying cold light source gas discharge lamp - Google Patents
Electronic ballast for safety voltage power-supplying cold light source gas discharge lamp Download PDFInfo
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- CN2421796Y CN2421796Y CN 00229655 CN00229655U CN2421796Y CN 2421796 Y CN2421796 Y CN 2421796Y CN 00229655 CN00229655 CN 00229655 CN 00229655 U CN00229655 U CN 00229655U CN 2421796 Y CN2421796 Y CN 2421796Y
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Abstract
The utility model provides an electronic ballast for a safety power-supplying cold light source gas discharge lamp. Voltage is mainly output by a high-frequency inverter circuit and is boosted by a high frequency transformer to provide power supply for a lamp by a ballast circuit; a lighting circuit takes voltage on both ends of a lamp and triggers a bidirectional diode after the voltage on both ends of a lamp is boosted by a voltage doubler circuit; the bidirectional diode is connected in series with an electric induction coil; the electric induction coil is wound on an iron core of a transformer or an iron core of a ballast. When a lamp is not lighted, because voltage on the both ends is high and the voltage breaks down the bidirectional diode after voltage doubler, pulse passes through the electric induction coil and couples on the subsidiary side of the transformer to cause the both ends of the lamp to achieve discharge voltage; when the lamp is lighted, the voltage on the both ends of the lamp is reduced, the bidirectional diode is turned off, and the lighting circuit does not work.
Description
The present invention relates to a kind of electronic ballast for gas discharge lamp as cold light source powered by safe voltage, belong to cold light source gaseous discharge lamp power technique fields.At present, because the cold light source gaseous discharge lamp is good because of its spectral characteristic, luminous efficiency is high and be used in outdoor as occasions such as road, square, tunnel, harbour and station terminals widely.Along with the raising of manufacturing technology, begun to expand to indoor application in recent years.Electric ballast is requisite parts that make this class lamp performance power savings advantages.In the application of common occasion (we are referred to as tradition), supply voltage is AC 110V or AC 220V, mainly is to be used for outdoor public place, and electric ballast replaces inductance type ballast only to have only 1～2 year history.(lamp of the scope of AC/DC 12V～48V) power supply owing to more meet the safety standard that family uses, is widely used low supply voltage, but because this type of lamp is lighted voltage generally more than 3000V, how to light a lamp more difficult with simple, method realization reliably.
The objective of the invention is to design the lamp circuit of a kind of cold light source gaseous discharge lamp when operation at low power supply voltage.
Technical scheme of the present invention is to realize like this, this ballast mainly comprises high-frequency inverter circuit, high frequency transformer, ballasting circuit and lamp circuit, high-frequency inverter circuit exports high frequency transformer 4 former limits to, high frequency transformer is paid the edge joint ballasting circuit, it mainly comprises the electric capacity 6 that is connected in the loop, ballast 7, gaseous discharge lamp 8 is connected in the loop, it is characterized in that lamp circuit comprises gets the voltage-multiplying circuit that lamp 8 both end voltage are boosted, the voltage-multiplying circuit output connecting triggering circuit, inductance coil 14 is arranged in the circuits for triggering, and inductance coil 14 has lotus root to close relation with high frequency transformer 4 or ballast inductance 7.Be inductance 14 and high frequency transformer 4 or ballast 7 iron cores and meet lotus root and close relation altogether.
Above-mentioned voltage-multiplying circuit is 2～5 multiplication of voltages.
Above-mentioned electronic amperite of gas-discharge lamp is characterized in that circuits for triggering comprise charging capacitor 12, and it is by current-limiting resistance and at the voltage-multiplying circuit output, switch element 13 be connected in parallel on capacitor 12 two ends after inductance 14 is connected.
Above-mentioned gaseous discharge lamp is characterized in that the switch element 13 in the circuits for triggering is bidirectional trigger diodes.
Advantage of the present invention is: lamp circuit is taked to boost with the multiplication of voltage method at high frequency side, required electric capacity is little, circuit is simple, loss is little, when charging capacitor reaches two-way triggering diode puncture voltage, the trigger current inductance coil 14 of flowing through, close by high frequency transformer or ballast iron core lotus root, make transformer pay the limit or the ballast coil induces high voltage, make gaseous discharge lamp obtain the above some modulating voltage of 3000V, because control signal is taken from the lamp two ends, to operating voltage, switching tube automatically shuts down its both end voltage of bright back that uses as a lamp by unloaded high pressure drop, and lamp circuit is not worked.This scheme has solved under the low-voltage power supply condition dexterously, the difficult problem of lighting a lamp of cold light source gaseous discharge lamp.Circuit is simple and reliable, stable, low consumption.It is widely used in field of gas discharge lamps such as high-pressure sodium lamp, low-pressure sodium lamp, Metal halogen lamp, meets security regulations.
Below accompanying drawing is described: Fig. 1 is a logic diagram of the present invention, Fig. 2 is the embodiment that inductance 14 and high frequency transformer lotus root are closed, Fig. 3 is the embodiment that inductance 14 and ballast lotus root are closed, among the figure: the 1st, pulse generating circuit, the 2nd, recommend the power transistor of usefulness, the 3rd, the former limit of high frequency transformer centre tap, the 4th, high frequency transformer, the 5th, transformer secondary side coil, the 6th, resonant capacitance, the 7th, the ballast coil, the 8th, gaseous discharge lamp, the 9th, the electric capacity in the voltage-multiplying circuit, the 10th, the diode in the voltage-multiplying circuit, the 11st, current-limiting resistance, the 12nd, charging capacitor; The 13rd, two-way triggering diode; The 14th, induction coil.
Narrate the embodiments of the invention and the course of work below:
Accompanying drawing 2 is embodiment 1:
After delivering to a pair of power transistor 2 of recommending usefulness by the chief and vice pulse signal 1 after amplifying, with typical push-pull circuit the current inversion of voltage 12V-48V is become alternating current, needed frequency of acquisition and voltage in the secondary coil 5 of transformer 4.When reaching the reasonable parameter coupling, coil 5 and 7, electric capacity 6 and fluorescent tube 8 reach resonance, make sodium vapor lamp be in the highest operating efficiency state.
Fluorescent tube is before lighting, the voltage of lamp tube ends is usually more than 100V, after lighting, voltage drops to about 50V, therefore, presses signal from the lamp tube ends power taking, the voltage-multiplying circuit of forming by electric capacity 9 and rectifying tube 10 boosts back resistance 11 linear flows that pass through to electric capacity 12 chargings, reach certain voltage and trigger double direction diode 13 conductings, send trigger impulse, utilize its high voltage signal that in transformer secondary side coil 5, obtains that gaseous discharge lamp 8 is lighted to coil 14.Obviously, use as a lamp bright after, the voltage of lamp tube ends has descended 1 times, after lamp is lighted, is tangible low impedance state, triggers diode and ends, high-tension some modulating signal do not existed.
Accompanying drawing 3 is embodiment 2:
More than all only the drawn situation of 2 multiplication of voltages of two figure, can increase as required and doubly want number of times, all to pay the number of turns of the number of turns, the ballast number of turns and inductance coil 14 on limit relevant with some modulating voltage and transformer for multiplication of voltage number of times, the selection of two-way triggering diode puncture voltage, can adjust mutually.The utility model inductance coil selects the 3-5 circle, and the double direction diode puncture voltage selects 240～300V, transformer to pay the limit 80～150 circles.
Claims (4)
1, a kind of electronic ballast for gas discharge lamp as cold light source powered by safe voltage, mainly comprise high-frequency inverter circuit, high frequency transformer, ballasting circuit and lamp circuit, high-frequency inverter circuit exports the former limit of high frequency transformer (4) to, high frequency transformer is paid the edge joint ballasting circuit, it mainly comprises the electric capacity (6) that is connected in the loop, ballast inductance (7), gaseous discharge lamp (8) is connected in the loop, it is characterized in that lamp circuit comprises gets the voltage-multiplying circuit that lamp (8) both end voltage is boosted, voltage-multiplying circuit output contact lamp circuits for triggering, inductance (14) is arranged in the circuits for triggering, and inductance (14) has lotus root to close relation with high frequency transformer (4) or ballast inductance (7).
2, electronic amperite of gas-discharge lamp according to claim 1 is characterized in that voltage-multiplying circuit is 2～5 multiplication of voltages.
3, electronic amperite of gas-discharge lamp according to claim 1 and 2, it is characterized in that circuits for triggering comprise charging capacitor (12), it is by current-limiting resistance and at the voltage-multiplying circuit output, switch element (13) be connected in parallel on capacitor (12) two ends after inductance (14) is connected.
4,, it is characterized in that the switch element (13) in the circuits for triggering is a bidirectional trigger diode according to claim 1 or 3 described electronic amperite of gas-discharge lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00229655 CN2421796Y (en) | 2000-04-12 | 2000-04-12 | Electronic ballast for safety voltage power-supplying cold light source gas discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00229655 CN2421796Y (en) | 2000-04-12 | 2000-04-12 | Electronic ballast for safety voltage power-supplying cold light source gas discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2421796Y true CN2421796Y (en) | 2001-02-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00229655 Expired - Fee Related CN2421796Y (en) | 2000-04-12 | 2000-04-12 | Electronic ballast for safety voltage power-supplying cold light source gas discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2421796Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765282B (en) * | 2009-09-01 | 2012-08-15 | 海洋王照明科技股份有限公司 | Xenon short-arc lamp start-up circuit and xenon short-arc lamp |
-
2000
- 2000-04-12 CN CN 00229655 patent/CN2421796Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765282B (en) * | 2009-09-01 | 2012-08-15 | 海洋王照明科技股份有限公司 | Xenon short-arc lamp start-up circuit and xenon short-arc lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |